By product, China-made products dominate the current market with the share of 80%. With the growth in installation and application of heat meters in China, the long-term reliable operation of heat meters has drawn the attention and concern of users. In order to ensure the long service life of heat meters, durability tests are inevitable in accordance with relevant provisions.

The EN1434-2007 standard (2400-hour durability tests) has been implemented in Europe since 2007, while the current standard in China only requires 300-hour durability tests. Therefore, Heat Meter Working Committee of China Metrology Association has conducted two durability tests of 2400 +300 hours from 2013, with the pass rate of nearly 90%, which provides a reliable evidence for the promotion and application of heat meters made in China.